U.S. President Barack Obama delivers remarks about the launch of the Affordable Care Act’s health insurance marketplaces.

President Barack Obama said one million people had tried to log on to the healthcare.gov website Tuesday morning to find out more about the rollout of the health law, causing logjams that the administration is trying to clear.

The president spoke in the Rose Garden about the launch of his signature domestic achievement.

“There have been times this morning where the site’s been running more slowly than it normally will,” he said. “The reason is because more than one million people visited healthcare.gov before seven in the morning. To put that in context, there were five times more users in the marketplace this morning than have ever been on medicare.gov at one time.”

Mr. Obama also picked up and ran with a comparison that’s been trotted out by administration officials several times in recent days: Apple’s iPhone upgrade.

“Consider that just a couple of weeks ago, Apple rolled out a new mobile operating system, and within days, they found a glitch, so they fixed it. I don’t remember anybody suggesting Apple should stop selling iPhones or iPads or threatening to shut down the company if they didn’t,” he said.

Republicans seized on the problems to argue that the law wasn’t ready for prime time. Senate Republicans sent out a memo titled, “Obamacare Crashing Across America.”

Mr. Obama was flanked by three women he said would stand to gain from the new insurance rules established by the law, chiefly requirements insurers to offer coverage to everyone equally regardless of their medical history.

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